1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Twin Peaks Quarry

Producer in Pima county in Arizona, United States with commodities Limestone, General, Stone, Crushed/Broken
Map
XML
JSON
KML
D
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Land status
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10210571
MRDS ID TC10196
MAS/MILS ID 0040190433
Record type Site
Current site name Twin Peaks Quarry
Alternate or previous names Rillito Quarry
Related records 10060229

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -111.19209, 32.35731 (WGS84)
Elevation 710
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Avra(quadrangle 1:24,000 scale)

Silver Bell Mountains(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Brawley Wash(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 012 S 011 E 26 C S2 Arizona

Commodities

Commodity Importance
Limestone, General Primary
Stone, Crushed/Broken Primary

Nearby scientific data

Main Entrance (1) -111.19209, 32.35731
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Deposit size Small
Significant No

Land status

Ownership category Unknown

Ownership information

  • Type Owner-Operator
    Owner Arizona Portland Cement Co.
    ID 200006
    Interest 100
    Home office California
    Year 1978

Reference information

Bibliographic references

  • Deposit

    ARIZ BUR MINES BULL 189 P103 1974

  • Deposit

    MSHA METAL-NONMETAL MINE FILE REFERENCE

  • Deposit

    E A ELEVATORSKI 1978 ARIZONA INDUSTRIAL MINERALS P 49

Reporter information

Type Date Name Affiliation Comment
Reporter 19-OCT-95 ADMR U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Current status (per MSHA)

StatusActive since 04/01/2012
MSHA mine ID0200006
Mine name (MSHA)RILLITO QUARRY
Current operatorCalPortland Company
Current controller (parent)Taiheiyo Cement Corp
Mine typeSurface (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.